1987856046 has 32 divisors (see below), whose sum is σ = 4819046400. Its totient is φ = 602380440.

The previous prime is 1987856027. The next prime is 1987856051. The reversal of 1987856046 is 6406587891.

1987856046 is a `hidden beast` number, since 1 + 9 + 8 + 78 + 560 + 4 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1987855983 and 1987856001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1672686 + ... + 1673873.

It is an arithmetic number, because the mean of its divisors is an integer number (150595200).

Almost surely, 2^1987856046 is an apocalyptic number.

1987856046 is an abundant number, since it is smaller than the sum of its proper divisors (2831190354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1987856046 is a wasteful number, since it uses less digits than its factorization.

1987856046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346581 (or 3346575 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 1987856046 is about 44585.3792851423. The cubic root of 1987856046 is about 1257.3658005445.

The spelling of 1987856046 in words is "one billion, nine hundred eighty-seven million, eight hundred fifty-six thousand, forty-six".